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<div class="moz-cite-prefix">Hi Jonathan,<br>
<br>
</div>
Ptolemy has a Python actor that uses Jython<br>
<br>
<a class="moz-txt-link-freetext" href="http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIfaq.htm#Scripting">http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIfaq.htm#Scripting</a>
says:<br>
<br>
<blockquote type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<dt> <a name="Scripting"><b>5.9 Is there a scripting interface to
Ptolemy II ?</b></a>
</dt>
<dd> The PythonScript actor includes and interface to
<a href="http://www.jython.org/#in_browser" target="_top">Jython</a>,
a Java implementation of Python. The PythonScript actor allows
the user to define an actor on the fly by defining the <code>fire()</code>
and other methods in Python. Using an interpreted language in
this context instead of defining actors in Java means that we
need not recompile and restart
Ptolemy II to make a change to an actor. The tradeoff is that a
PythonScript actor will run more slowly than a similar actor
implemented in Java. <br>
For details, see
<a
href="http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/codeDoc/ptolemy/actor/lib/python/PythonScript.html"
target="_top"><code>http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/codeDoc/ptolemy/actor/lib/python/PythonScript.html</code></a>
<p>The Ptolemy II test suite uses Jacl, a Java implementation of
Tcl
as a scripting language. With Jacl, we can build and run
models
using an interpreted scripting environment without compilation
and avoiding the usual edit/compile/run loop. <br>
For details, see the Testing link in <a
href="http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/coding/index.htm"
target="_top"><code>http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/doc/coding/</code></a>
</p>
</dd>
</blockquote>
<br>
I'm not that up on how Jython accesses Java objects, but in theory
one could write an actor that gets the container object, then finds
a parameter and then calls setExpression o the parameter. This
could happen at runtime. However, this is difficult to get right.
The SetVariable actor does something similar and it is not an easy
actor to write. A Jython-based actor that set parameter values in
the container would need to be very similar to SetVariable. See
<a class="moz-txt-link-freetext" href="http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII8.0/ptII/doc/codeDoc/ptolemy/actor/lib/SetVariable.html">http://ptolemy.eecs.berkeley.edu/ptolemyII/ptII8.0/ptII/doc/codeDoc/ptolemy/actor/lib/SetVariable.html</a><br>
<br>
If you are trying to do a parameter sweep, then
<a class="moz-txt-link-freetext" href="http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIfaq.htm#parameterSweeps">http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIfaq.htm#parameterSweeps</a>
says:<br>
<br>
<blockquote type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<dt> <a name="parameterSweeps"><b>4.11 How do a do a parameter
sweep?</b></a>
</dt>
<dd> A Parameter Sweep is when a model is run a number of times
with different parameters to perhaps find an optimal solution.
For details, see <a
href="http://chess.eecs.berkeley.edu/ptexternal/wiki/Main/ParameterSweeps#in_browser"
target="_top">http://chess.eecs.berkeley.edu/ptexternal/wiki/Main/ParameterSweeps</a>.
</dd>
</blockquote>
Another idea is to have Jython set the parameters and then run the
model. We do similar things using Tcl in the test case. See
ptolemy/moml/test/MoMLParser.tcl<br>
<br>
This test from ptolemy/actor/lib/test/Test.xml loads a .xml file and
runs it<br>
<br>
<blockquote type="cite">test Test-3.0 {Test case where training and
we get no data} {<br>
# Thomas Mandl pointed out this bug and supplied a
fix <br>
set workspace [java::new ptolemy.kernel.util.Workspace
"Test3_0"]<br>
set parser [java::new ptolemy.moml.MoMLParser $workspace]<br>
$parser reset<br>
$parser purgeAllModelRecords<br>
$parser setMoMLFilters [java::null]<br>
$parser addMoMLFilters \<br>
[java::call ptolemy.moml.filter.BackwardCompatibility
allFilters]<br>
<br>
$parser addMoMLFilter [java::new \<br>
ptolemy.moml.filter.RemoveGraphicalClasses]<br>
#set model3_0
\
<br>
# [java::cast ptolemy.actor.TypedCompositeActor [$parser
parseFile BooleanSwitch\<br>
_RegressionTest.xml]]
<br>
set model3_0 \<br>
[java::cast ptolemy.actor.TypedCompositeActor [$parser
parseFile BooleanSwitch\<br>
_RegressionTest_WrongTrainingValues.xml]]<br>
set manager [java::new ptolemy.actor.Manager $workspace
"test3_0Manager"]<br>
$model3_0 setManager $manager<br>
$manager execute<br>
<br>
# Get the corrrectValues parameter, which should be
{} <br>
set test2 [$model3_0 getEntity Test2]<br>
set correctValues [java::cast ptolemy.data.expr.Parameter
[$test2 getAttribute corr\<br>
ectValues]]<br>
<br>
list [$correctValues getExpression]<br>
<br>
} {{{}}}</blockquote>
<br>
Later in that file we get the Test2 entity<br>
<blockquote type="cite"> set test2 [$model3_0 getEntity Test2]<br>
</blockquote>
and the get the "correctValues" parameter<br>
<blockquote type="cite"> set correctValues [java::cast
ptolemy.data.expr.Parameter [$test2 getAttribute correctValues]]</blockquote>
To get the value of the correctValues parameter, call
"$correctValues getExpression".<br>
<br>
To set the value<br>
$correctValues setExpression "{1,2}"<br>
<br>
It is probably possible to do something similar in Jython, where you
instantiate the model by calling the parser set the variables and
run it. You could use the Recorder actor to get the outputs of the
model, or write the data using ExpressionWriter or LineWriter.<br>
<br>
_Christopher<br>
<br>
On 10/21/13 10:51 AM, Jonathan Boright wrote:<br>
<blockquote
cite="mid:CAFEwxXKSPxuRn8ppkA53FyRTK-Ypexw0FZUEO4m8d66nPLz3cw@mail.gmail.com"
type="cite">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>I'm wondering if there is a way to set workflow parameters
using python code? I see the ParameterSet actor, but I'd like
to set parameters dynamically using python instead of using a
static text file... </div>
<div><br>
</div>
<div>Thanks for your help.</div>
<div><br>
</div>
<div>Jon</div>
<div><br>
</div>
<div><br clear="all">
<div>---------------------------------<br>
Jonathan Boright<br>
Research Scientist<br>
ISciences, LLC<br>
61 Main Street, Suite 200<br>
Burlington, VT 05401<br>
<br>
</div>
</div>
</div>
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<br>
<pre class="moz-signature" cols="72">--
Christopher Brooks, PMP University of California
Academic Program Manager & Software Engineer US Mail: 337 Cory Hall
CHESS/iCyPhy/Ptolemy/TerraSwarm Berkeley, CA 94720-1774
<a class="moz-txt-link-abbreviated" href="mailto:cxh@eecs.berkeley.edu">cxh@eecs.berkeley.edu</a>, 707.332.0670 (Office: 545Q Cory)
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